//
// Created by 11510 on 2024/6/8.
//
#include <string.h>
#include <unistd.h>
#include <iostream>
#include <fstream>
#include <sstream>
using std::cin;
using std::cerr;
using std::cout;
using std::endl;
using std::ifstream;
using std::ofstream;
using std::string;
using std::istringstream;
using std::ostringstream;


void test0(){
    int num1 = 123, num2 = 456;
    ostringstream oss;

    oss << num1 << " " << num2;
    string res = oss.str();
    // std::cout << res << std::endl;

    string str("hello");
    // ! bug to_string()有问题
    // string str2 = str + "world " + std::to_string(3);
    // std::cout << str2 << std::endl;

    

}

int main() {
    test0();
    return 0;
}